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run code in 200+ php & hhvm versions
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<?php //$secret = "3d3d516343746d4d6d6c315669563362"; $secret = "TEST"; //echo $s2 = base64_decode($secret); //echo $s3 = strrev($s2); //echo hex2bin($s3); echo "----------"; echo bin2hex(strrev(base64_encode("TEST")));